We are contacting you to make you aware that the hardware node that your server resides on was rebooted for emergency maintenance. The RAID controller began to experience overheating issues. These issues appear to be cleared up. Unfortunately, due to the hardware node's high uptime, a filesystem check was forced. We are monitoring this check closely and will send out another email when we have confirmed that service has been restored. If you have any questions or concerns, please let us know

Can't help but notice that the sentence "The RAID controller began to experience overheating issues" .. could have been written more simply > The RAID controller overheated. Or even "was overheating". Either way, seems it was toasty and needed replacing.